ENGLEWOOD, Colo.—Liberty Global Inc., the cable TV operator controlled by media mogul John Malone, said Thursday that it bought a stake of almost 13 percent in Dutch cable TV provider Ziggo NV for about 632.5 million euros ($809.6 million), expanding its presence in the Netherlands.

Liberty, which is based in Englewood, Colo., said it bought 25.3 million Ziggo shares, a 12.65 percent stake, for 25 euros ($32) per share from Barclays PLC. The shares represent a 12.65 percent stake in Ziggo,

Liberty said the minority stake in Ziggo was an attractive opportunity to invest in a market where it already has a substantial presence with its UPC subsidiary. It also pointed to the stock’s dividend yield of about 7.4 percent and expectations that Ziggo will pay 370 million euros ($473.6 million) of dividends in 2013.

Ziggo provides TV, internet and phone services to about 2.8 million households. The news sent its shares up about 11 percent in European trading.

Liberty said it plans to fund the purchase with a combination of debt and cash. Its shares finished at $72.35 on Wednesday after setting a 52-week high of $72.40 earlier in the session.

DENVER — Colorado energy regulators on Monday proposed tighter rules for shutting down oil and gas pipelines after a fatal explosion blamed on natural gas leaking from a line that was thought to be out of service but was still connected to a well. The Colorado Oil and Gas Conservation Commission rules govern flow lines, which carry oil, gas and...